Every Tuesday, I review the newest Blu-ray releases and let you know whether they’re worth buying, renting or skipping, along with a breakdown of the included extras. If you see something you like, click on the cover art to purchase the Blu-ray from Amazon, and be sure to share each week’s column on Facebook and Twitter with your friends.

“Snowpiercer”

WHAT: The year is 2031 AD, and after a failed global-warming experiment has frozen the planet, killing off nearly all life in the process, the lucky few survivors live aboard the Snowpiercer, a train that perpetually travels around the globe. With a class system in place that divides the population by train car, lower-class passenger Curtis (Chris Evans) leads a rebellion against the oppressors in an attempt to take control of the engine and the fates of his fellow people.

WHY: Fans of Korean director Bong Joon-ho (“The Host”) have been awaiting his English-language debut for quite some time, and that wait was extended even longer when The Weinstein Company delayed its U.S. release over a dispute about the film’s original cut. In the end, Bong was successful in protecting his vision, which is a major victory for both the filmmaker and his would-be audience, especially for a movie as refreshingly unique as “Snowpiercer.” Though it’s not the sci-fi masterpiece that many have lauded it as, the film is one of the better post-apocalyptic thrillers in recent memory. A lot of that credit actually goes to the creators of the French graphic novel on which its based, but Bong brings plenty to the table as well, including some gorgeous visuals and the casting of frequent collaborator Song Kang-ho in a vital role. Chris Evans also turns in a solid performance as the de facto leader of the lower class rebels, while Tilda Swinton steals the show with an amusingly quirky turn as the right-hand woman of the train’s mysterious engineer. The blending of art house sensibilities with mainstream appeal makes for a really intriguing finished product, but the ending is so disappointing that it undermines the ambition and imagination of everything that precedes it.

EXTRAS: The Blu-ray release includes an audio commentary by film critics like Scott Weinberg, James Rocchi and Jen Yamato, a documentary about the making of the movie, additional featurettes on the production process, an interview with Chris Evans and Tilda Swinton, a behind-the-scenes look at the promotional tour, concept art galleries and an animated prologue.

FINAL VERDICT: RENT

“Sex Tape”

WHAT: Desperate to add a little spice back into their life, married couple Jay (Jason Segel) and Annie (Cameron Diaz) decide to make a sex tape trying out every position from “The Joy of Sex.” But when they wake up the next day to discover that the video was accidentally uploaded to the iPads that Jay gifted to various family and friends, they go on a frantic search to track them all down before anyone has a chance to see it.

WHY: “Sex Tape” is an infuriating movie to watch, especially if you don’t like characters that have no common sense. Despite being one giant commercial for the iPad (at one point, Segel’s character even declares how well constructed it is), it doesn’t understand the technology behind the device. Anyone with a basic knowledge of smartphones, tablets and the Cloud knows that Jay’s videos wouldn’t automatically sync to the other iPads unless they were still connected to his Apple account, but there’s absolutely no reason the recipients would do this, because it would essentially render their devices useless. Worse yet, the identity of the mysterious “villain” blackmailing Jay and Annie is an absolute joke, threatening them with putting the video on a popular internet porn site unless they pay a hefty bounty. Jay could just call the website and have them take it down, but they chose a much more excessive method because it seems funnier, even though it’s really not. Cameron Diaz and Jason Segel fail to display a fraction of the chemistry that they had in “Bad Teacher,” and although there are some amusing comments on parenthood in the opening act, once the hunt for the sex tape kicks into gear, the film nosedives quicker than a kamikaze fighter pilot.

EXTRAS: In addition to a selection of deleted scenes, alternate takes and bloopers, there’s a featurette on the chemistry between director Jake Kasdan and his two leads, as well as a discussion with psychotherapist Dr. Jenn Berman about the film.

It’s incredible to think that in the short 10 years since the release of “Shaun of the Dead,” the zombie comedy has practically become its own subgenre, even spawning several “rom-zom-coms” (romantic zombie comedies, a term coined during the marketing for that film) in the process. But while Edgar Wright’s 2004 debut was a blisteringly funny homage to zombie movies, there’s yet to be another film that even comes close to matching its genre-bending wit and sense of fun. Which brings me to “Life After Beth,” the latest rom-zom-com to try and fail at duplicating that success. Surprisingly dull and unfunny for the talent involved, “Life After Beth” is a dead-on-arrival comedy that’s just as much in need of some brains as its title character.

Dane DeHaan stars as Zach, a gloomy teenager mourning the death of his girlfriend, Beth Slocum (Aubrey Plaza), after she was killed by a snakebite while hiking alone in the woods. Depressed and seeking comfort from Beth’s parents (John C. Reilly and Molly Shannon), Zach is offended when the couple suddenly cuts him off without so much as an explanation. So when Zach goes to their house looking for answers, he’s shocked to discover that Beth is very much alive, although without any memory of the past few days. While they’re not exactly sure how it happened (the possibility of a Jesus-like resurrection is debated), the Slocums are just happy to have their daughter back, and they’re willing to let Zach continue to see her if he promises to keep Beth’s return from the grave a secret. But as Zach attempts to rekindle their relationship, he can’t shake the feeling that something isn’t right with her.